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4.3 Identification
4.3.1 Type key for pump unit
The example shows a VdS-approved Fire NKF 80-250 pump unit,
with the following components:
•
270 mm impeller
•
BAQE shaft seal
•
diesel engine as driver
•
flexible coupling.
4.3.2 Codes for shaft seal
The shaft seal is described by means of a code consisting of four
letters. See the table below.
4.3.3 Type key for engine
The example shows a non-listed John Deere standard engine
with a 4.5 litre cylinder capacity. Cooling takes place via a heat
exchanger.
Example:
Fire
NK
F
80
-250
/270
D
F
X
D
B
A
F
Fire systems
Pump type
F: Pump approved for fire fighting
Nominal diameter of discharge port [mm]
Pump housing size [mm]
Actual impeller diameter [mm]
Driver
D: Diesel engine
Approvals of the pump
F: VdS
Approvals of the pump unit
X: No specific approval
Pipe connections
D: DIN flange
Controller with control panel
B: For mounting on base frame
Mechanical shaft seal
A: BAQE
Coupling
F: Flexible coupling, type Centaflex
Position
Code
Description
1
B
Rubber bellows seal
Position
Code
Material
2 and 3
A
Metal-impregnated carbon
Q
Silicon carbide
Position
Code
Material
4
E
EPDM
Example:
J
U
4
H -NL 24
Engine type
J:
John Deere-based engine
Engine series
U: Standard range
4-cylinder engine = 4.5 litres
6-cylinder engine = 6.8 litres
W: Special range
6-cylinder engine = 8.1 litres
X: 6-cylinder engine = 12.5 litres
Number of cylinders
4: 4 cylinders
6: 6 cylinders
Cooling
H: via heat exchanger
Approvals of engine
NL: non-listed
Code for rated power
